The Monterey Bay Aquarium covers 550,000 square feet across three levels

The Monterey Bay Aquarium occupies 550,000 square feet of floor space spread over three levels of a building that sits on the Monterey Peninsula in California. The structure itself is built into a former sardine cannery on the waterfront, so the building's footprint is fixed by what was already there. The aquarium does not sprawl across multiple buildings — it is one connected facility where you move between galleries on the same property.

The three-level layout means the exhibit space is stacked vertically rather than spread horizontally. Ground level, second level, and third level each hold different galleries and tank systems. This design lets the aquarium fit a large number of exhibits into a relatively compact waterfront location, which matters because real estate on the Monterey Peninsula is expensive and limited.

Key Takeaways

  • The aquarium occupies 550,000 square feet across three levels in a converted sardine cannery building on the Monterey waterfront.
  • The building holds over 200 galleries and habitats, not all of which are open to visitors at the same time.
  • The main tank, called the Kelp Forest, is 70 feet tall and holds 335,000 gallons of water.
  • A typical visit takes three to four hours to walk through the main galleries, though you can spend longer if you watch the feeding demonstrations and talks.

What the 550,000 square feet actually contains

The 550,000 square feet includes galleries, tank rooms, behind-the-scenes spaces, hallways, restrooms, a gift shop, a restaurant, and offices. Not all of that space is exhibit space that visitors see. The actual number of galleries open to the public is over 200, though the count varies depending on how you define a gallery — some are small alcoves with a single tank, others are large rooms with multiple exhibits.

The building also houses the aquarium's research and animal care operations. Tanks, filtration systems, and holding areas for animals take up significant space that visitors do not walk through. The aquarium maintains animals both in public exhibits and in behind-the-scenes facilities, so the total animal population is larger than what you see on the floor.

The Kelp Forest tank and other major exhibits

The largest single exhibit is the Kelp Forest, a tank that is 70 feet tall and holds 335,000 gallons of water. This tank is visible from multiple levels of the building because of its height. It contains kelp, fish, sea urchins, and other animals that live in California's kelp forests. The tank is designed to mimic the structure and conditions of a real kelp forest ecosystem.

Other major exhibits include the Open Ocean tank, which holds 1.2 million gallons and contains large fish like tuna and sea turtles, and the Jellies galleries, which span multiple rooms and showcase different jellyfish species. The Outer Bay exhibit is another large tank that shows animals from the open ocean. These major exhibits take up more floor space than the smaller tanks because they need room for both the tank itself and the viewing areas around it.

How long it takes to walk through

A typical visit to see the main galleries takes three to four hours if you move at a steady pace and read some of the information plaques. If you stop to watch the feeding demonstrations, which happen several times a day, or attend one of the naturalist talks, you can easily spend five to six hours. Some visitors spend an entire day there.

The three-level layout means you will walk up and down stairs or use elevators multiple times. The path is not a straightforward loop — you can move between levels in different places, so the order in which you see galleries depends on which route you choose. The aquarium does not have a single "correct" direction to walk through.

Comparison to other major aquariums

The Monterey Bay Aquarium is one of the largest aquariums in the United States by floor space. The Georgia Aquarium in Atlanta is larger at 550,000 square feet as well, though the two buildings use their space differently. The Shedd Aquarium in Chicago is smaller at around 200,000 square feet. The National Aquarium in Baltimore is roughly 120,000 square feet.

Floor space does not always translate directly to the number of animals or the amount of water. An aquarium with a smaller footprint might have taller tanks or more densely packed exhibits. The Monterey Bay Aquarium is known for its large open-water tanks and its focus on California marine life, which shapes how it uses its 550,000 square feet differently than an aquarium that focuses on tropical fish or freshwater animals.

What affects how crowded it feels

Even though 550,000 square feet is a substantial amount of space, the aquarium can feel crowded during peak times like summer weekends and school holidays. The galleries are not all the same size — some narrow hallways with popular tanks create bottlenecks where visitors bunch up. Other galleries are large open rooms where the same number of people feels less dense.

The time of day matters more than the total floor space. Visiting on a weekday morning or late afternoon typically means fewer people per square foot than a Saturday afternoon. The aquarium does not limit the number of daily visitors, so capacity depends on how many tickets are sold on a given day rather than on the building's physical size.

Frequently Asked Questions

Can you see the whole aquarium in one day?

Yes, most people see all the main galleries in one visit. A typical visit is three to four hours. If you move quickly and skip the talks and demonstrations, you can finish in two to three hours. If you linger and watch the feeding times, plan for five to six hours.

Is the Monterey Bay Aquarium bigger than the Georgia Aquarium?

They are roughly the same size at 550,000 square feet each. The Georgia Aquarium holds more total water and has larger tanks, but the Monterey Bay Aquarium uses its space differently, with an emphasis on California marine ecosystems rather than large open-ocean tanks.

How many tanks are in the aquarium?

The aquarium has over 200 galleries and habitats, though not all are separate tanks. Some galleries contain multiple smaller tanks, and some large exhibits like the Kelp Forest are single massive tanks. The exact count depends on how you define a tank or gallery.

Is there a map of the aquarium you can get before you visit?

Yes, the aquarium provides a printed map at the entrance and posts a map on its website. The map shows the three levels and the location of major exhibits, restrooms, and the restaurant. You can also read the aquarium's mobile app, which has an interactive map and information about each exhibit.